DEN00LA167 · Cessna R172K
Cessna R172K · Accident: total loss of engine power (mechanical failure) en route
From Centennial Airport (APA) to FTG · WATKINS, CO
Event
- NTSB case
- DEN00LA167
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- 0
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Cessna R172K
- Aircraft type
- Cessna 172
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N1036V
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Centennial Airport (APA), Englewood, COTo FTG · WATKINS, CO
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- En route · cruise
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Total loss of engine power (mechanical failure)
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
- Terrain condition › None suitable
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
During the night cross-country flight, the engine started to run rough and then seized. The pilot made an emergency descent and completed a forced landing in a rough field. Upon impact with the ground, the nose gear strut collapsed and buckled the firewall. A post accident engine teardown examination identified that the engine oil pump shaft or 'idler pin' for the driven gear had worked free from its pressed-in position on the accessory case. The movement of the pin allowed it to fracture through the engine oil pump cover plate and come in contact with the tachometer drive gear resulting in the fracture of the tachometer drive gear shaft. The fracture of the tachometer drive shaft resulted in the failure of the engine oil pump resulting in the loss of engine oil pressure and the subsequent total loss of engine power.
Probable cause
The unsuitable terrain for a forced landing. Contributing factors were the total loss of engine power due to the failure of the engine oil pump and the dark night light conditions.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record DEN00LA167
- Event ID
- 20001212X21952
- Case number
- DEN00LA167
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: local date, investigation status. Values present in the bulk record are kept.
- The date is the local date; the NTSB stores the UTC date 2000-09-10.
- API snapshot SHA-256: c98201df1c9b29c80e3c56bf34a5bcea949a92ea2a500c24f2577c9be97aa3ec; retrieved 2026-09-21T20:05:24.338Z.